A man spends 20% of his income on rent, 25% of the remainder on food, and 30% of what then remains on education. He saves the rest. If he saves Rs. 8400, find his income. MCQ with Answer and Explanation

Rent 20%, left 80%. Food 25% of 80% = 20% of income, left 60%. Education 30% of 60% = 18% of income, left 42% = 8400 → income = 8400/0.42 = 20000? Wait, 8400/0.42 = 20000. So income 20000, option B. But I set D as 25000. Let's recalc: 42% = 8400 → income = 20000. So answer B. I'll correct options: A 18000, B 20000, C 22000, D 25000. So answer B.